Middle Eastern-Style Grilled Chicken Kabobs

Bahan-bahan (4 porsi)

• 1 cup plain whole milk Greek yogurt
• 2 tablespoons extra-virgin olive oil
• 2 teaspoons paprika
• ½ teaspoon cumin
• ⅛ teaspoon ground cinnamon
• 1 teaspoon crushed red pepper flakes ((reduce to ½ teaspoon for less heat))
• Zest of one lemon
• 2 tablespoons freshly squeezed lemon juice, (from one lemon)
• 1¾ teaspoons salt
• ½ teaspoon freshly ground black pepper
• 5 cloves garlic , (minced)
• 2½ to 3 lb boneless skinless chicken thighs, (trimmed of excess fat and cut into 1½-in/4-cm pieces (see note))
• 1 large red onion, (cut into 1-in (2.5-cm) chunks)
• Vegetable oil, (for greasing the grill)